Correlation does not imply causation.
Even if we start talking about the "straight" providers discussed in this forum who ended up being 100% gay and in some cases fucked by Shemales, let me tell you that would be a long list.
I also have another long list of acquaintances who have kids and are gay or were "straight", had kids and family life made them realize how gay they are. Straight men are my specialty and I know what I saw when I looked at his IG.
In my experience, real straight providers are upfront about it and select "Position = Top" because they wouldn't have any problems receiving oral or in most extreme cases, penetrating a client. Worst case scenario they will say that they only do muscle worship but those don't last in the market.
When a provider is completely vague about what he is/does, i.e.: "Ask me", "Ask me", "Ask me", especially if it's a muscled guy, and he's only a masseur and not able to get hard, or "conveniently selective" about when he gives the extras to specific clients, the guy is a bottom who will suck cock and will get fucked when he meets a client he likes. When he's with a client he dislikes then he uses the "Straight" card and says "Oh I'm straight I'm not gonna get hard or do anything sexual with you". Probably the reason why he let his RM profile expire. If a provider is on RM and unable to get hard or fuck, it's not profitable, it won't last.
I don't need to meet him in person. It's just decades of experience hiring.